Stuck at 1 Gbps after upgrading to You2000? Here's why

A pattern I've seen repeatedly: someone upgrades from You1000 to You2000, runs a speed test, and gets approximately 940 Mbps. They assume YouFibre haven't applied the upgrade correctly and raise a support ticket. In the vast majority of cases, the line is delivering 2 Gbps just fine - the bottleneck is somewhere in the user's own hardware or configuration.

This is a checklist of the most common causes, in roughly the order I'd work through them.

1. Don't test via Wi-Fi

Before anything else: ignore Wi-Fi speed tests entirely until you've confirmed the line speed over Ethernet. Even Wi-Fi 6E or Wi-Fi 7 devices will struggle to hit a consistent 2 Gbps - there are too many variables involved (channel congestion, client capability, distance, interference). If you can't see 2 Gbps via a wired connection, you won't see it over Wi-Fi either. Confirm the wired result first, then investigate wireless separately if needed.

2. Check whether your PC has a 2.5 GbE port

This is the most common cause by far. The majority of consumer PCs and laptops ship with a standard Gigabit Ethernet port (1 GbE), which is physically incapable of sustaining more than around 940 Mbps. If your machine only has a 1 GbE port, that's your ceiling regardless of what the line can deliver.

On Windows, you can check this without opening the case. Go to Settings → Network & Internet, click the Properties button for your active connection, and look for Link speed (Receive/Transmit). If it reads 1000/1000 Mbps, you have a Gigabit port. You need at least 2500/2500 Mbps (2.5 GbE) to exceed that limit.

The fix is either a USB-to-2.5GbE adapter or a PCIe 2.5 GbE NIC. If you go the USB route, make sure you're plugging into a USB 3 port - they're typically coloured blue and labelled SS (SuperSpeed). USB 2 doesn't have enough bandwidth.

3. Check your cables

For 2.5 Gbps, you need at least a Cat5e cable - and that covers most cable runs made in the last 20 years. However, not all cables are labelled, and even in 2026 some manufacturers include Cat5 cables in the box with new hardware. I recently received a Cat5 cable bundled with a new device released just a month prior.

If you're unsure, swap both the cable between your router and the ONT, and the cable between your PC and your router, for a known-good Cat5e or Cat6 cable. Shorter cables are better, and cheap Cat5e cables can fail at higher speeds even if they work fine at Gigabit. Cat6 is the safer choice for any new purchase and is inexpensive.

4. Check your router hardware

YouFibre provides different hardware for different speed tiers. If you kept your old router after upgrading, or purchased your own, it may be the bottleneck.

There's a specific trap here: many routers marketed as "2.5 Gbps capable" have a single 2.5 GbE WAN port but only Gigabit LAN ports. The router can receive the full 2 Gbps from the ONT, but it can only forward a maximum of 1 Gbps to any device on the local network. You need both a 2.5 GbE (or 10 GbE) WAN port and a 2.5 GbE LAN port to deliver 2 Gbps end-to-end.

Check the spec sheet for your router carefully, not just the headline marketing figure. If the LAN ports are listed as 1 GbE, that router will never deliver more than ~940 Mbps to a connected device, regardless of what arrives at the WAN.

5. Check QoS settings

Many routers include a Quality of Service (QoS) or traffic management feature that prioritises latency-sensitive traffic (video calls, gaming) over bulk transfers. To work correctly, QoS needs to know your connection's maximum speed - and that figure is often set automatically during initial setup by running a speed test at the time.

If you were on You1000 when you first configured QoS, the router may have recorded your maximum speed as ~940 Mbps and is now artificially capping throughput to that figure to leave headroom for high-priority traffic. Log into your router admin interface, find the QoS or traffic management settings, and either update the maximum speed to 2000 Mbps or disable QoS entirely to test.

6. Use the right speed testing tools

Browser-based speed tests can underperform at very high speeds due to limitations in how browsers handle multiple TCP connections. If you're getting disappointing results in the browser, it's worth trying a native application instead.

Speedtest.net has a native Windows app that tends to produce more consistent results at these speeds. For a more technical test, public iperf3 servers are a useful option - they test raw TCP throughput without the overhead of a web interface.

7. If none of the above applies, contact YouFibre about the ONT

If your PC has a 2.5 GbE or 10 GbE port, your cables are good, your router has 2.5 GbE on both WAN and LAN, QoS is disabled, and you're still seeing exactly ~940 Mbps - the issue may be the ONT (the small fibre termination box on the wall, often an Adtran unit). The ONT doesn't always automatically apply a new speed profile after a package upgrade.

At this point, contact YouFibre support and ask them to reset the ONT and push the correct configuration for your new package. This is a quick fix on their end once everything else has been ruled out.